<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="../js/jquery-3.5.1.js"></script>
    <script src="../js/config.js"></script>
</head>
<body>
<div class="top"></div>
<div class="center">
    <p>你好，我在中间！</p>
</div>
<div class="bottom"></div>

<script type="text/javascript">
    //在js中引入


</script>
</body>
</html>